Different modes can energise different components. Knowing which ordinary selection preceded a trip helps an engineer plan assessment without requiring you to reproduce it.
What the observation means
A trip during fan baking is different evidence from one during grilling or a cleaning cycle. The time between selection and trip also matters. It still does not identify a specific component without proper testing.
A useful next step
Leave the oven unused and record the existing event. Do not repeatedly reset the breaker, try every mode or use a stronger fuse to find a workaround. Describe any accompanying smell, noise or spill when arranging help.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.